package com.itheima.domain;

public class PinJie {
    public static void main(String[] args) {
        int[] arr = {1,2,3};
        String s = arrToString(arr);
        System.out.println(s);
    }

    private static String arrToString(int[] arr) {
        StringBuilder sb = new StringBuilder("[");
        for (int i = 0; i < arr.length; i++) {
            if(i == arr.length-1){
                sb.append(arr[i]).append(']');
            }else{
                sb.append(arr[i]).append(", ");
            }
        }
        return sb.toString();
    }
}
